JP2009106972A - Bending machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bending machine with which the safety of workers is contrived by indicating an operation state by the striking part of a back gage, guiding the workers by clarifying the range in which a workpiece is struck and with which the presence of a striking part is clearly expressed to the workers even when the circumference is dark. <P>SOLUTION: This bending machine has a striking part 5 of the back gage for positioning by striking a workpiece W and the operation state indicating means 10, 11, 12 for indicating the operation state are provided on the striking part 5. The operation state indicating means 10, 11, 12 are provided on the front surface of the striking part 5 and the operation state indicating means 10, 11, 12 are composed of a plurality of light emitting diodes (LEDs). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  In the present invention, the abutting part of the back gauge displays the operation state to ensure the safety of the operator, guides the operator by clarifying the range where the workpiece is abutted, and works even when the surroundings are dark. The present invention relates to a bending apparatus that clearly indicates the presence of an abutting portion to a person.

  Conventionally, a press brake has been provided with a workpiece positioning device as disclosed in, for example, Japanese Patent No. 3668895 and Japanese Utility Model Laid-Open No. 4-47818, and the workpiece positioning device is used for abutting and positioning a workpiece. A back gauge butting portion.

  Among them, the workpiece positioning device disclosed in the above-mentioned Japanese Patent No. 3668895 is provided with a plurality of contact confirmation sensors in one abutting portion, and when the workpiece is actually abutted, the corresponding abutment confirmation sensor is provided. If all are turned on and the foot pedal is not turned on, the ram is not lowered.

  With this configuration, regardless of the shape of the abutting portion of the workpiece against the back gauge, it is accurately determined whether or not the abutting portion of the workpiece is properly in contact with the abutting portion of the back gauge. As a result, the production of defective products can be prevented, the processing efficiency can be improved, and the burden on the operator can be reduced.

  Moreover, in the workpiece positioning device disclosed in the Japanese Utility Model Publication No. 4-47818, one selection lamp is provided in one abutting portion, and when the abutting portion is selected, the selection lamp is Lights up or flashes.

With this configuration, the worker can see which abutment portion has been selected only by looking at the selection lamp that is lit or blinked, and the workability is improved.
Japanese Patent No. 3668895 Japanese Utility Model Publication No. 4-47818

  However, the abutting portion constituting the back gauge of the work positioning device disclosed in Japanese Patent No. 3668895 and Japanese Utility Model Publication No. Hei 4-47818 is in its operating state (for example, whether it is moving, positioning completed, or when an alarm occurs) ) Etc.) is not provided.

As a result, for example, although the back gauge abutting part is moving, the worker may hit the moving abutting part without knowing that, which is extremely dangerous, and an alarm is generated. Even though the abutting portion is stopped, the worker may not be aware of it and may be waiting, and the alarm may not be immediately released, which may be very inefficient.

  Further, it has been unclear at which position the conventional abutting portion should abut the workpiece.

For example, in the invention described in the above-mentioned Japanese Patent No. 3668895, one of a plurality of contact sensors to be turned on is displayed for each bending order. While doing.

However, it is very painful for the operator to work against the back gauge abutting portion while looking at the screen each time because the workability is very bad.

  Further, the abutting portion of the back gauge is disposed behind the lower table (corresponding to FIG. 1), and an upper table is provided above and side plates are provided on both sides.

Therefore, the abutting portion is generally in a position where the periphery is dark and difficult for the operator to see.

As a result, an abutment error occurs (for example, the work must be abutted in parallel but it is abutted obliquely) when the work is abutted. It becomes a state.

In recent years, high-mix low-volume production has become mainstream, and the shape of the workpiece has become smaller and more complicated, and cannot be handled with the conventional abutting portion.

The object of the present invention is to provide an abutment portion of the back gauge to display the operation state for the safety of the operator, to clarify the range where the workpiece is abutted, to guide the operator, and the surroundings are dark. Also provides a bending apparatus that clearly indicates the presence of the abutting portion to the operator.

In order to solve the above problems, the present invention provides:
As described in claim 1, there is an abutting portion 5 of the back gauge 7 for abutting and positioning the work W, and the abutting portion 5 displays the operation state display means 10, 11, A bending apparatus characterized by comprising 12;
As described in claim 6, the operation state display means 10, 11, 12 provided in the back gauge abutting portion 5,
A machining information determination unit 24C that determines a die, a die layout, a workpiece position, and a back gauge position for each bending process based on product information;
An abutment information determination unit 24D for determining an operation state such as whether or not the abutment unit 5 of the back gauge is moving;
Based on the determination of the abutment information determination unit 24D, a technical means called a bending apparatus is provided, which includes a display unit control unit 24E that drives and controls the operation state display units 10, 11, and 12. .

According to the configuration of the present invention described above, the operation state display means 10 (FIG. 2), 11 and 12 for displaying the operation state is provided on the abutting portion 5 of the back gauge 7 (FIG. 1). Since the status display means 10, 11, and 12 are provided on the front surface of the abutting portion 5, and the operation status display means 10, 11, and 12 are configured by three LEDs, the yellow LED 10 is (FIGS. 3 and 4). The abutting portion 5 displays that the moving portion is moving, the blue LED 11 indicates that the abutting portion 5 has completed positioning, and the red LED 12 indicates that the abutting portion 5 has generated an alarm. In this case, the abutting portion of the back gauge displays the operation state by the above-described color coding, so that the safety of the operator is achieved.

Further, the abutting portion 5 of the back gauge 7 is provided with workpiece abutting range display means 13, 14, 15, 16, 17 for displaying a range where the workpiece W (FIG. 2) is abutted, and this is constituted by a plurality of LEDs. If it is configured and only the LED in the range where the workpiece W abuts can be turned on (FIGS. 6 to 7), the range where the workpiece is abutted can be clarified to guide the operator and work efficiency can be improved. If the LEDs 13 to 17 belonging to the contact range are lit, the presence of the abutting portion can be clearly shown to the operator even if the surroundings are dark, no abutting error occurs, and no defective product occurs. It is safe for the worker S.

  As a result, according to the present invention, the abutting portion of the back gauge displays the operation state to ensure the safety of the worker, clarify the range in which the workpiece is abutted, guide the worker, and Even if it is dark, there is an effect of providing a bending device that clearly indicates the presence of the abutting portion to the operator.

Further, according to the present invention, since the operation state display means 10, 11, 12 (FIGS. 2 to 5) described above are configured by LEDs, the operator S (FIG. 1) abuts the back gauge 7 5 can be appealed to the visual sense of the operator S when compared with the means of appealing to the auditory sense such as a buzzer (for example, in the case of generating a beep sound at the time of an alarm, The noise is drowned out by the internal noise and the operator is often unaware of the beeping sound), and the operation state of the abutting portion 5 can be easily determined.

Furthermore, according to the present invention, in addition to the operation state display means 10, 11, 12 (FIGS. 2 to 5), work contact range display means 13, 14, 15, 16, 17 are provided, and Since the contact range display means 13, 14, 15, 16, and 17 are configured by LEDs, when the worker S abuts the work W against the abutment portion 5 of the back gauge 7 (FIG. 1) (FIG. 8), There is an effect that it is possible to easily determine whether the butt is normal (FIG. 8A) or abnormal butt (FIG. 8B), depending on the leakage of light emitted from the LED.

Hereinafter, the present invention will be described with reference to the accompanying drawings by embodiments.
FIG. 1 is a diagram showing an embodiment of the present invention, and the illustrated bending apparatus is, for example, a press brake.

  This press brake has side plates 30 on both sides of the machine body, and an upper table 1 that is a ram is attached to the upper portion of the side plate 30 via a hydraulic cylinder 34, for example. A punch P is mounted through 32.

  The lower table 2 is disposed below the side plate 30, and a die D is mounted on the lower table 2 via a holding plate 33.

That is, the bending apparatus of FIG. 1 is a descending press brake, and the operator S abuts and positions the workpiece W against an abutting portion 5 of a back gauge 7 described later disposed behind the lower table 2. After (step 111 in FIG. 12), when the foot pedal 6 (FIG. 1) is depressed and turned on, the hydraulic cylinder 34 is actuated via the ram control unit 24G and the ram 1 is lowered, so that the punch P and the die D Thus, the workpiece W is bent (step 112 in FIG. 12).

  A back gauge 7 having the abutting portion 5 is provided behind the lower table 2 (FIG. 1), and the back gauge 7 is supported by the lower table 2 via, for example, a link mechanism (not shown). .

  A stretch 25 is provided between the link mechanisms on both sides of the lower table 2 (FIGS. 1 and 2) in the left-right direction (X-axis direction), and the stretch 25 has a butting portion 5 at the front. The abutting portion main body 26 is attached to an X-axis motor Mx (not shown) so as to be movable in the left-right direction, and a link mechanism is moved back and forth (Y-axis direction) by a Y-axis motor My (not shown). It is possible to move in the vertical direction (Z-axis direction).

  With this configuration, the back gauge 7 is positioned at a predetermined position in advance by the back gauge control unit 24F (FIG. 1) described later (YES in step 108 in FIG. 12).

  The abutting portion 5 (FIG. 2) includes a distal end portion 5A, an intermediate portion 5B, and a proximal end portion 5C.

  The front end portion 5A abuts the workpiece W on the front surface, the front end portion 5A is attached to the intermediate portion 5B, and below the intermediate portion 5B, operation state display means 10, 11, 12 and the controller 5D of the workpiece contact range display means 13, 14, 15, 16, 17 are arranged, and the base end portion 5C is directly attached to the main body 26.

On the front upper portion of the tip 5A, the operation state display means 10, 11, 12 are provided. However, workpiece contact range display means 13, 14, 15, 16, and 17 are provided at the lower part of the front surface, respectively.

The operation state display means 10, 11, 12 display the operation state of the abutting portion 5, for example, whether the abutting portion 5 is moving or when positioning is completed, and a plurality of (three in this embodiment) LEDs 10. , 11 and 12.

Of these, the leftmost LED 10 (FIG. 3) is yellow when activated, indicating that the abutment portion 5 is moving, the middle LED 11 is blue when activated, and the abutment portion 5 has completed positioning. And the rightmost LED 12 is red when activated, indicating that the abutment portion 5 has generated an alarm.

For example, when positioning the workpiece W (FIG. 4) against the back gauge butting portion 5, it is necessary to position the butting portion 5 at a predetermined position in advance. For example, the first position in the X-axis direction is X1. The next position is X2.

In this case, when the abutting portion 5 is positioned at the first position X1, the middle LED 11 is blue, so that an operator who sees it knows that the positioning of the abutting portion 5 has been completed. Position the workpiece W against 5.

And while the abutting part 5 moves to the next position X2, since the leftmost LED 10 is yellow, the operator who sees it knows that the abutting part 5 is moving, and the abutting part Do not do dangerous things such as positioning the work W against 5.

Furthermore, if the abutting portion 5 (FIG. 5) is accidentally made to reach the limit value in the left-right direction (X-axis direction) (the overtravel OT value in FIG. 5A) while moving, or both abutments When the part 5 is brought closer to the minimum interval value L (FIG. 5B), the rightmost LED 12 is red, so the operator knows that the abutting part 5 has generated an alarm. Immediately remove the cause of the alarm.
Moreover, although the said operation state display means 10, 11, 12 comprised with several LED, this invention is not limited to this, It can also comprise with one LED, In this case, one piece Similarly, the LEDs exhibit yellow, blue, and red depending on the operating state of the abutting portion 5. That is, when one LED is yellow, it indicates that the abutting portion 5 is moving, and when it is blue, it indicates that the abutting portion 5 has completed positioning, In the case, the abutting portion 5 displays that an alarm has occurred.

On the other hand, the workpiece abutting range display means 13, 14, 15, 16, and 17 (FIG. 3) display a range in which the workpiece W is abutted on the front surface of the abutting portion 5 (FIGS. 6 to 7). It is comprised by LED13, 14, 15, 16, 17 (five in this embodiment).

For example, as shown in FIG. 6, the bending line m on the workpiece W is bent, and the end surface of the workpiece W is to be positioned in parallel with the two left and right butting portions 5 of the back gauge 7. When this is done, the LEDs 13, 14, 15, 16, and 17 of both the abutting portions 5 are turned on to display the range in which the workpiece W is abutted.

However, as will be described later, the two abutting portions 5 may have different ranges in which the workpiece W is abutted (FIG. 7A), and the LEDs 13, 14, 15, 16, It is also possible to display the range in which the workpiece W is abutted only by lighting any one of 17 (FIG. 7B).

  FIG. 8 is a diagram illustrating an operation example according to the present invention. When the back gauge abutting portion 5 is positioned at a predetermined position, it is determined that the positioning is completed (YES in step 108 in FIG. 12), and the positioning is completed. The LED (blue) to be displayed is turned on, the abutting portion 5 is stopped (step 109 in FIG. 12), and the LEDs 13 to 17 belonging to the abutting range of the workpiece W are turned on (step 110 in FIG. 12).

Then, the operator is guided by the lit LED and abuts the workpiece W against the front surface of the abutting portion 5. If the abutting is normal but abuts the workpiece W against the front surface of the abutting portion 5, FIG. As shown in A), no light leaks.

However, if it is an abnormal abutment that strikes the workpiece W diagonally against the front surface of the abutment portion 5, light leaks as shown in FIG.

Therefore, according to the present invention, by providing the workpiece abutting range display means 13 to 17 at the lower part of the front surface of the abutting portion 5, it is possible to easily determine whether or not the abutting is abutted and to eliminate abutting mistake.

On the other hand, a foot pedal 6 is arranged in the vicinity of the lower table 2 (FIG. 1), and the operator S is guided to the work abutting range display means 13 (FIG. 2), 14, 15, 16, 17 described above. After positioning the workpiece W against the butting portion 5 (step 111 in FIG. 12), when the foot pedal 6 is depressed and turned ON, the ram control unit 24G (FIG. 1) that detects that is the hydraulic cylinder. 34 is operated to lower the ram 1 and bending is performed (step 112 in FIG. 12).

  The press brake NC device 24 having such a configuration (FIG. 1) includes a CPU 24A, an input unit 24B, a machining information determination unit 24C, an abutment information determination unit 24D, a display means control unit 24E, and a back gauge. It is comprised by the control part 24F and the ram control part 24G.

  The CPU 24A performs overall control of the entire apparatus shown in FIG. 1, such as the machining information determination unit 24C, the abutment information determination unit 24D, and the display means control unit 24E, according to an operation procedure (for example, corresponding to FIG. 12) for carrying out the present invention.

  The input unit 24B is composed of, for example, an operation panel movably attached to the upper table 1, and inputs product information J from the host NC device 23 (step 101 in FIG. 12). It is stored in a storage unit (not shown) and used for determining the bending order, mold, mold layout, and the like.

  The product information J is, for example, CAD information, and includes information such as the thickness, material, bending line length, bending angle of the product, and flange dimensions of the workpiece W (FIG. 9). It is configured as a diagram.

Further, the host NC device 23 is installed, for example, in an office, and the NC device 24 is installed as a lower NC device for the host NC device 23, for example, in a factory where the press brake is provided.

In the example shown in FIG. 1, product information J is built in the host NC device 23, and the NC device 24 provided with the product information J from the host NC device 23 controls the operation of the present invention ( FIG. 12).

However, the present invention is not limited to this, and the host NC device 23 also has a machining information determination unit 24C, a butting portion information determination unit 24D, and the like, like the NC device 24, and the host NC device. 23 can directly control the operation of the present invention by performing predetermined data processing based on the built-in product information J (FIG. 12).

Further, the product information J can be manually input by the operator S instead of automatically inputting the product information J from the host NC device 23 to the input unit 24B of the NC device 24 (FIG. 1). It is.

  The machining information determination unit 24C (FIG. 1), based on the product information J, the molds P and D used for each bending order and bending order (bending process) of the workpiece W, the mold layout, and the position of the workpiece W. In addition to determining the position of the back gauge 7, the D value and the L value are also determined (step 102 in FIG. 12).

  For example, as shown in FIG. 9, the bending lines m1 to m4 of the flat work W are bent in the order of (1) to (4), and finally, the flanges F1 to F4 stand up as shown in the figure. If the product is to be processed, the bending order and the like are determined in consideration of the lengths L1 to L4 of the bending lines.

In this case, as is well known, the position of the back gauge 7 is determined by the left-right direction (X-axis direction) and the front-rear direction (Y (Axial direction) and vertical (Z-axis direction) positions (FIG. 10).

The abutment information determination unit 24D (FIG. 1) is an operation state of the back gauge abutment unit 5, for example, whether it is moving (step 105 in FIG. 12), whether an alarm is generated, etc. (step 107 in FIG. 12). Determine the operating state.

  That is, although the back gauge position for each bending order is determined by the processing information determination unit 24C (FIG. 1) (step 102 in FIG. 12), for example, the first positioning position in the X-axis direction (FIG. 4) is X1, The next positioning position is X2.

In this case, as described above, when the abutting portion 5 is between the positions X1 and X2, the operating state of the abutting portion 5 is moving. That is determined, and for example, when the abutting portion 5 is between the positions X1 and X2, the storage portion (not shown) stores that it is moving (database in FIG. 10).

Further, as described above, when the abutting portion 5 reaches the position X1 or X2, the operating state of the abutting portion 5 is the completion of positioning. Similarly, when the abutting portion 5 reaches the position X1 or X2, the storage portion (not shown) stores that the positioning is completed.

Furthermore, as described above, when the abutting portion 5 reaches the limit value in the left-right direction (X-axis direction) (FIG. 5A), or when both abutting portions 5 are at the minimum interval value L (FIG. 5 ( B)), the operating state of the abutment unit 5 is in an alarm state, so that the abutment information determination unit 24D determines that fact and similarly, a storage unit (not shown) When the abutting portion 5 reaches the limit value in the left-right direction (X-axis direction), the alarm state is stored.

  Further, the abutting information determination unit 24D (FIG. 1), when a workpiece W is abutted against the front surface of the back gauge abutting portion 5 (FIGS. 6 to 7), the workpiece abutting within the range in which the workpiece W is abutted. The hit range display means 13-17 are determined.

That is, according to the product information J (FIGS. 1 and 9), the shape of the abutting portion of the work W for each bending process can be created (process diagram). Based on the contact state between the abutting portion and the back gauge abutting portion 5, the workpiece abutting range is known.

  For example, as the shape of the simplest workpiece abutting portion, as shown in FIG. 6 described above, there is a flat end surface shape over the entire left and right direction. In this case, judging from the length of the bending line m When the end face is abutted against the entire two abutting portions 5 of the back gauge 7, the workpiece W is positioned without being inclined.

  Therefore, it is clear that the workpiece abutting range in this case is the entire front surface of the back gauge abutting portion 5.

  Therefore, according to the abutting information determination unit 24D, the workpiece abutting range display means 13 to 17 belonging to the workpiece abutting range are determined, for example, as indicated by ○ in the bending step (bending order) 1 of FIG. .

  The determination result is similarly converted into a database and stored in a storage unit (not shown).

That is, with respect to the two butting parts 5, all the LEDs 13 to 17 are used.
Belongs to the workpiece abutting range, and the operator can easily abut and position the workpiece W by being guided by all the LEDs 13 to 17 that are lit.

Further, for example, as the shape of the workpiece abutting portion, there are flanges F ₁ and F ₂ having relatively narrow widths (X-axis direction) as shown in FIG. 7A. In this case, the position of the workpiece W , And the respective widths of both flanges F ₁ and F ₂ and the distance between them, the workpiece W does not tilt when it is abutted against part of the two abutting portions 5 of the back gauge 7. Is positioned.

  Accordingly, the workpiece abutting range in this case is a part of the front surface of both back gauge abutting portions 5, and according to the abutting information determining unit 24D, the workpiece abutting range display means 13 belonging to the workpiece abutting range. -17 are determined, for example, as indicated by ◯ in the bending order X of FIG. 11, and the determination results are similarly stored in a database and stored in a storage unit (not shown).

That is, regarding the left butting portion 5 of the two butting portions 5, the LEDs 14 and 15
However, regarding the right abutment portion 5, the LEDs 16, 17 are used. Belong to the workpiece abutting range, and the operator can easily abut and position the workpiece W by being guided by the lit LEDs 14 and 15 and the LEDs 16 and 17.

Furthermore, as a shape of the workpiece abutting portion, for example, as shown in FIG. 7B, there is a flange F having a very narrow width. In this case, a part of one abutting portion 5 of the back gauge 7 is provided. The workpiece W is positioned without being tilted when it is abutted against.

  Therefore, the workpiece abutting range in this case is a part of the front surface of one back gauge abutting portion 5, and according to the abutting information determining unit 24D, the workpiece abutting range display means belonging to the workpiece abutting range is provided. 14 to 16 are determined, for example, as indicated by ◯ in the bending order Y of FIG. 11, and the determination results are similarly stored in a database and stored in a storage unit (not shown).

That is, the LEDs 14 to 16 with respect to one left abutting portion 5.
Belongs to the workpiece abutting range, and the operator can easily abut and position the workpiece W by being guided by the lit LEDs 14 to 16.

On the other hand, the display means control unit 24E (FIG. 1) drives and controls the operation state display means 10, 11, and 12 described above based on the determination by the abutment information determination unit 24D.

That is, according to the abutment information determination unit 24D, an operating state such as whether or not the backgage abutment unit 5 is moving is determined (FIG. 10). Based on this determination, the display means control unit 24E drives and controls the operation state display means 10, 11, 1 including three LEDs.

For example, the display means control unit 24E (FIG. 1) includes an X-axis motor Mx (not shown), an X-axis motor Mx (not shown), and a Z-axis motor Mz (not shown) that drive the butting portion 5 of the back gauge 7. By inputting the feedback signal from the encoder, the position of the butting portion 5 (X-axis direction, Y-axis direction, Z-axis direction) can be detected.

Thereby, the display means control unit 24E detects the position of the abutting unit 5 and refers to the database of FIG. 10, and if the abutting unit 5 is between the positions X1 and X2, for example, the abutting unit 5 Is determined to be moving, and by controlling the controller 5D (FIG. 2) described above, the LED 10 (yellow) is connected to the power source and the LED 10 (yellow) is turned on (step 105 → step in FIG. 10). 106).

Further, the display means control unit 24E (FIG. 1) also drives and controls the above-described workpiece contact range display means 13 to 17 (FIGS. 2 and 3) based on the determination by the contact information determination unit 24D.

That is, according to the abutting information determination unit 24D, the workpiece abutting range display means 13 to 17 belonging to the workpiece abutting range when the workpiece W is abutted against the abutting portion 5 of the back gauge is determined. 11), based on this determination, the display means control unit 24E drives and controls the predetermined workpiece contact range display means 13-17.

For example, the display means control unit 24E (FIG. 1) refers to the database of FIG. 11 when processing a predetermined product (FIG. 9), and when the bending order is 1 (FIG. 11), All the LEDs 13 to 17 with respect to the butting portion 5
Belongs to the workpiece abutting range, and at the time of processing in the bending order 1, after positioning the abutting portion 5 at a predetermined position (step 108 → step 109 in FIG. 12), the controller 5D (FIG. 2) described above is controlled. Thus, all the LEDs 13 to 17 are connected to the power source, and each LED is turned on (step 110 in FIG. 12).

The back gauge control unit 24F (FIG. 1) controls the X-axis motor Mx (not shown), the Y-axis motor My (not shown), and the Z-axis motor Mz (not shown) to place the back gauge 7 at a predetermined position. (FIG. 4), the ram control unit 24G (FIG. 1) controls the ram 1 by controlling the hydraulic cylinder 34 which is a ram drive source.

The operation of the present invention having the above configuration will be described below with reference to FIG.

(1)
Operations until the workpiece contact range display means 13 to 17 are determined.
In step 101 of FIG. 11, product information J is input from the host NC device 23, and in step 102, bending order, mold, mold layout, D value, L value, work position, and back gauge position are determined. In 103, the operating state of the back gauge abutting portion 5 and the workpiece abutting range display means 13 to 17 are determined.

  That is, when the CPU 24A detects that the product information J is input from the host NC device 23 (FIG. 1), the bending order, the mold, the mold layout, etc. described above are checked via the machining information determination unit 24C. The operating state of the back gauge abutting unit 5 and the workpiece abutting range display means 13 to 17 are determined via the abutting information determining unit 24D, and the determined operating state (FIGS. 10 and 11) is converted into a database. And stored in a storage unit (not shown).

(2)
Positioning operation of the back gauge abutting portion 5.
In step 104 of FIG. 12, the back gauge abutting portion 5 is operated. In step 105, it is determined whether or not the abutting portion 5 is moving. When (yellow) is lit up and not moving (NO), the process returns to step 104 and the same operation is repeated.

That is, when the operation by the machining information determination unit 24C and the abutment information determination unit 24D is finished (FIG. 1), the CPU 24A drives and controls the X-axis motor Mx (not shown) and the like via the back gauge control unit 24F. The butting part 5 of the back gauge 7 is operated.

During this time, as described above, the CPU 24A inputs the feedback signal from the encoder such as the X-axis motor Mx to the display means control unit 24E, and the position of the butting unit 5 (X-axis direction, Y-axis direction, Z axis direction) and referring to the database shown in FIG. 10, when it is determined that the abutting portion 5 is moving, the controller 5D (FIG. 2) is controlled to move it. The LED 10 (yellow) indicating that there is a light is turned on.

  Further, in step 107 of FIG. 12, it is determined whether or not an alarm has occurred. If it has occurred (YES), the LED 12 (red) is turned on in step 113 and the back gauge butting portion 5 is stopped. If no alarm is generated (NO in step 107), it is determined in step 108 whether or not positioning is completed. If positioning is complete (YES), LED 11 (blue) is lit in step 109. At the same time, when the back gauge abutting portion 5 is stopped and positioning is not completed (NO in step 108), the process returns to step 105 and the same operation is repeated.

  Similarly, the CPU 24A detects the position of the abutting unit 5 via the display means control unit 24E and refers to the database of FIG. 10, and the abutting unit 5 generates an alarm or completes positioning ( 5), the controller 5D (FIG. 2) is controlled to turn on the LED 12 (red) for displaying an alarm or the LED 11 (blue) for indicating the completion of positioning. The contact part 5 is stopped.

  When the abutting portion 5 generates an alarm, the abutting portion 5 remains stopped, and the operator removes the cause.

For example, when the abutting portion 5 erroneously reaches the limit value in the left-right direction (FIG. 5A), the operator manually returns the abutting portion 5 to the original position to prepare for the next operation.

(3) Positioning operation and bending operation of the workpiece W.
However, when the abutting portion 5 is completely positioned (YES in step 108 of FIG. 12), as described above, the LED 11 (blue) is turned on and the back gauge abutting portion 5 is stopped ( Step 109) Further, the LEDs belonging to the workpiece contact range are turned on (Step 110).

That is, the CPU 24A (FIG. 1), after positioning the abutting portion 5 at a predetermined position via the back gauge control portion 24F, refers to the database of FIG. 11 and corresponds to the bending process (bending order) to be performed from now on. The LED to be turned on is determined, and the LEDs belonging to the predetermined workpiece contact range are turned on via the display means control unit 24E.

Accordingly, the worker S (FIG. 1) is very easily positioned at a predetermined position on the front surface of the abutting portion 5 by being guided by the lit LEDs 13 to 17 (FIGS. 6 to 7). Then, when the foot pedal 6 (FIG. 1) is depressed, the ram 1 is lowered and a predetermined bending process is performed on the workpiece W (step 112 in FIG. 12).

  In the present invention, the abutting part of the back gauge displays the operation state to ensure the safety of the operator, guides the operator by clarifying the range where the workpiece is abutted, and works even when the surroundings are dark. It is used in a bending machine that clearly indicates the presence of the abutting part to the user. Specifically, it is applied not only to the descending press brake but also to the ascending press brake. is there.

1 is an overall view showing an embodiment of the present invention. It is a perspective view of the back gauge 7 which comprises this invention. FIG. 3 is a front view of FIG. 2. It is a figure which shows the operation state of the back gauge butting part 5 by this invention. It is a figure which shows the other example of FIG. It is a figure which shows the workpiece | work butting range by this invention. It is a figure which shows the other example of FIG. It is a figure which shows the operation example of the back gauge butting part 5 by this invention. It is a figure which shows the example of the product information by this invention. It is explanatory drawing of the abutting information determination part 24D which comprises this invention. It is a figure which shows the other example of FIG. It is a flowchart for demonstrating operation | movement of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Upper table 2 Lower table 5 Abutting part 6 Foot pedal 7 Back gauges 10, 11, 12
Operating state display means 13, 14, 15, 16, 17 Work abutting range display means 23 Host NC device 24 NC device 24A CPU
24B Input unit 24C Processing information determination unit 24D Abutment information determination unit 24E Display means control unit 24F Back gauge control unit 24G Ram control unit 25 Stretch 26 Abutment unit body 30 Side plate 32 Intermediate plate 33 Holding plate 34 Hydraulic cylinder D Die P Punch W Work

Claims (7)

A bending apparatus comprising an abutting portion of a back gauge for abutting and positioning a workpiece, and provided with an operating state display means for displaying the operating state at the abutting portion. 2. The bending apparatus according to claim 1, wherein the operation state display means is provided on a front surface of the abutting portion, and the operation state display means is constituted by a plurality of or one LED. The plurality of LEDs are three LEDs, and yellow, blue, and red are displayed depending on the operating state of the abutting portion. The yellow LED indicates that the abutting portion is moving, and the blue LED indicates the abutting portion. The bending apparatus according to claim 2, which indicates that the positioning has been completed, and the red LED indicates that the abutting portion has generated an alarm. The one LED exhibits yellow, blue, and red depending on the operating state of the abutting portion. When the one LED is yellow, the abutting portion indicates that it is moving, and when it is blue, the abutting portion is positioned. The bending apparatus according to claim 2, wherein the completion is displayed, and if the color is red, the abutting portion displays an alarm. The operation state display means is provided at the upper part of the front surface of the abutting part, and the work abutting range display means for displaying the range where the work is abutted is provided at the lower part of the front surface of the abutting part. 2. A bending apparatus according to claim 1, wherein said means is constituted by a plurality of LEDs. An operation state display means provided in the back gauge abutting portion;
Based on product information, for each bending process, a processing information determination unit that determines the mold, mold layout, workpiece position, back gauge position,
An abutment information determination unit for determining an operation state such as whether or not the abutment unit of the back gauge is moving;
A bending apparatus, comprising: a display control unit that drives and controls the operation state display unit provided in the back gauge butting unit based on the determination of the butting unit information determining unit. The abutting information determination unit determines a workpiece abutting range display unit belonging to the abutting range of the workpiece when the workpiece is abutted against the back gauge abutting unit, and the display unit control unit is configured to determine the abutting information determination unit. The bending apparatus according to claim 6, wherein the predetermined workpiece abutting range display means is driven and controlled based on the determination by the step.

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